window.onload=function () {

    //音乐列表出现
    var music = document.getElementsByClassName('music')[0];
    var musicForm = document.getElementsByClassName('musicForm')[0];
    music.onclick = function () {
        if (judge == true) {
            musicForm.style.display = 'block';
            judge = false;

        } else {
            musicForm.style.display = 'none';
            judge = true;
        }
    }

}

